<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>画盒子</title>
    <style>
.red{
    width: 100px;
    height: 100px;
    background-color: red;
}
.orange{
    width: 100px;
    height: 100px;
    background-color: orangered;
}
p{
    font-size: 30px;
}

    </style>
</head>
<body>
   <div class="red">div1</div>
   <div class="orange">div2</div> 
   <p>测试字体大小</p>
</body>
</html>